Artesis MCM Quick Installation Manual

MCM RS485/RS422
NETWORK
QUICK INSTALLATION GUIDE
MCM units are designed to connect to MCM
Networks and to one or more computers using
industry standart RS485 / RS422 networks.
This guide can be used to create a MCM Network
of up to 31 MCM units. For larger installations,
multiple smaller MCM Networks should be setup
using this guide, and connected to a larger network
as explained in MCM TCP/IP Network Quick
Installation Guide. MCM Network mentioned in this
guide refers to only MCM Networks with up to 31
MCM's connected together with RS485/RS422.
1. OVERVIEW OF MCM NETWORK
MCM Networks may be setup in various ways. A
standart MCM Network can be seen in the picture
below:
Document ID: 535-43757485-479-09-QM-EN
MCM communicates with other devices on the
network using optically isolated (2500V) 4 wire
(RS422 19200 Baud) or 2 wire (RS485 9600 Baud)
physical layer. Each MCM unit works as a slave in
a master-slave based protocol, hence needs a
network address. MCM Networks can function at up
to 1000 m distance with LIYC 2x2x0,22 shielded
twisted pair cable, although in noisy environments
this distance is smaller.
MCM Network protocol named ARTEBUS is made
up of one HOST (PC or MOXA) and multiple
CLIENTS (MCM's). HOST regularly sends data
packets which include an address specific to the
intended CLIENT, and that CLIENT responds
accordingly.
A MCM Network can be connected to a PC using a
RS485/RS232 Converter or to a wider TCP/IP
network using a RS485/TCP/IP Converter units.
RS485/RS232 Converter enables a PC to connect
to a MCM Network using a PC standart RS232
connection.
MOXA, a RS485/TCP/IP Converter, functions as a
bridge between a RS485 network and a TCP/IP
network by acting as a TCP/IP server and a RS485
host at the same time. It is possible to connect
MCM Networks to local intranet and internet using
MOXA units.
NOTE: Each MCM unit on the same network
must have a unique address to function
properly!
2. SETUP
2.1. Setting up a MCM Network
Follow the steps below to create a MCM Network:
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1. Prepare each MCM Unit to be connected to the
current MCM Network by following instructions
inside the Quick Installation Guide applicable to
that specific MCM Unit.
2. Select a RS485/RS422 network topology (daisy
chain – recommended, star etc.) which best
suits your intended physical location. The
recommended type is the one shown on page
one of this guide, in which each MCM unit is
connected to a four wire line with termination
resistors after the last MCM unit. If such a
setup is not possible, smaller MCM Networks
can be setup. Refer to MCM & MCMSCADA
Manuals for detailed information.
3. During cabling, try to avoid places where
electromagnetic interference will be present.
These places include cables with high current,
magnets etc.
4. Starting from the MCM that is furthest from the
PC or MOXA, cut out enough cable to reach the
next MCM.
5. Attach the connector that will plug into the MCM
as shown below.
6. Only for the last MCM on the line, connetion
cables for connecting 100Ohm termination
resistors between Tx and Rx terminals. Attach
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